マイナス１いっ歳さい

noun

prenatal period; time in the womb

Refers to the period before birth, often used in contexts like prenatal education or development. Literally 'minus one year old'.

• 胎たい教きょうはマイナス１歳さいからの教きょう育いくと言いわれる。

  Prenatal education is said to be education from minus one year old.

• マイナス１歳さいの時じ期きに、赤あかちゃんはお腹なかの中なかで多おおくのことを学まなぶ。

  During the prenatal period, babies learn many things in the womb.